These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
What Do You Mean It Is Not Symbolic: There is an argument that the amounts of light the Three Spirits have, from Past with almost 100% down to Future with almost zero, is symbolic of Scrooge's journey.